Find the Mean of the Binomial Random Variable

question 59

Multiple Choice

Find the mean of the binomial random variable. Round to two decimal places when necessary.
-On a multiple choice test with 6 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the random variable X, the
Number of correct answers.

• A)4.5
• B)3
• C)1.5
• D)2

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Definitions:

Excitatory

Referring to neurons or substances that increase the likelihood of a neuron firing, thus promoting neural activity.

Inhibitory

Describes something that restrains, blocks, or suppresses a specific action, process, or reaction in biological or chemical systems.

Limbic System

A complex system of nerves and networks in the brain, involved in basic emotions such as fear and pleasure, and drives such as hunger and sex.

Hypothalamus

A region of the brain that regulates bodily functions including temperature, hunger, and thirst.